Outflowing gas shifts Lyman-alpha emission blue (IMAGE)

University of Utah

Outflowing gas shifts Lyman-alpha emission blue

Caption

A Lyman-alpha emission is of the wavelength represented here as Lyman-alpha line. When gas is outflowing, the Lyman-alpha emission shifts into the longer, redder wavelength. The opposite occurs when gas is inflowing--the Lyman-alpha emission's wavelength appears to get shorter, shifting it into a bluer spectrum.

Credit

Zheng Zheng

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